food tests Flashcards
1
Q
Starch
A
add iodine
result = orange to blue black
2
Q
reducing sugars
A
glucose, fructose, galactose,lactose, maltose
benedicts and heat
result = blue to orange
3
Q
non reducing sugars
A
following negative bendicts test
add acid and boil
add alkali to neutralise
add benedicts and heat
positive = orange
4
Q
protiens
A
add buiret
blue to purple
5
Q
lipids
A
dissolve sample in ethanol
add distilled water
white emoltion occurs
